B=(B-SKF)=40° Contact Angle. XL=X-Life. 2RS=Rubber Seals At Each Side Of The Bearing. TVP=(P-Cage Segment)=Moulded Polyamide Window-Type Cage, Rolling Element Riding. L198=Lubrication. L138=(Segment Lubrication, Code 3)=NS Hi-Lube Grease Lithium